lackadaisical

Definitions

Lacking enthusiasm and determination; carelessly lazy.

Characterized by a lack of interest, vigor, or effort.

Examples

His lackadaisical approach to his studies resulted in poor grades throughout the semester.

The team's lackadaisical performance in the first half of the game cost them the championship.

Synonyms

lethargic listless languid indifferent apathetic lazy halfhearted

Antonyms

energetic enthusiastic diligent determined ambitious spirited industrious